631240761 has 8 divisors (see below), whose sum is σ = 842038560. Its totient is φ = 420635072.

The previous prime is 631240751. The next prime is 631240807. The reversal of 631240761 is 167042136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631240761 - 2²² = 627046457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631240711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40176 + ... + 53633.

It is an arithmetic number, because the mean of its divisors is an integer number (105254820).

Almost surely, 2^631240761 is an apocalyptic number.

It is an amenable number.

631240761 is a deficient number, since it is larger than the sum of its proper divisors (210797799).

631240761 is a wasteful number, since it uses less digits than its factorization.

631240761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96055.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 631240761 is about 25124.5051891575. The cubic root of 631240761 is about 857.8243007199.

Adding to 631240761 its reverse (167042136), we get a palindrome (798282897).

The spelling of 631240761 in words is "six hundred thirty-one million, two hundred forty thousand, seven hundred sixty-one".